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feature: expose preimage in forward+settle event

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Until now, clients of SubscribeHTLCEvents didn't have access to the settled preimage. The API allows to intercept forward event and to be updated on forward events however the forward+settle event does not include the payment preimage. This pr changes allows it.
This commit is contained in:
offerm
2021-06-15 22:01:24 +03:00
parent 1868c7dec1
commit 2c4dbfa19f
10 changed files with 295 additions and 251 deletions
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9
htlcswitch/htlcnotifier.go
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@@ -8,6 +8,7 @@ import (
"github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/htlcswitch/hop"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/lightningnetwork/lnd/subscribe"
)
@@ -281,6 +282,9 @@ type SettleEvent struct {
// forwards with their corresponding forwarding event.
HtlcKey
// Preimage that was released for settling the htlc.
Preimage lntypes.Preimage
// HtlcEventType classifies the event as part of a local send or
// receive, or as part of a forward.
HtlcEventType
@@ -360,9 +364,12 @@ func (h *HtlcNotifier) NotifyForwardingFailEvent(key HtlcKey,
// to as part of a forward or a receive to our node has been settled.
//
// Note this is part of the htlcNotifier interface.
func (h *HtlcNotifier) NotifySettleEvent(key HtlcKey, eventType HtlcEventType) {
func (h *HtlcNotifier) NotifySettleEvent(key HtlcKey,
preimage lntypes.Preimage, eventType HtlcEventType) {
event := &SettleEvent{
HtlcKey: key,
Preimage: preimage,
HtlcEventType: eventType,
Timestamp: h.now(),
}